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Title: Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Lya-Forests [Measurements of BAO correlations at z = 2.3 with SDSS DR12 Lyα-Forests]

Here, we use flux-transmission correlations in Lyα forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra of 157,783 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12). Besides the statistical improvements on our previous studies using SDSS DR9 and DR11, we have implemented numerous improvements in the analysis procedure, allowing us to construct a physical model of the correlation function and to investigate potential systematic errors in the determination of the BAO peak position. The Hubble distance, D H = c/H(z), relative to the sound horizon is D H(z = 2.33)/r d = 9.07 ± 0.31. The best-determined combination of comoving angular-diameter distance, D M, and the Hubble distance is found to be D 0.7 HD 0.3 M/r d = 13.94 ± 0.35. This value is 1.028 ± 0.026 times the prediction of the flat- ΛCDM model consistent with the cosmic microwave background (CMB) anisotropy spectrum. The errors include marginalization over the effects of unidentified high-density absorption systems and fluctuations in ultraviolet ionizing radiation. Independently of the CMB measurements, the combination of our results and other BAO observations determine the open-ΛCDM density parametersmore » to be Ω M = 0.296 ± 0.029, Ω Λ = 0.699 ± 0.100 and Ω k = –0.002 ± 0.119.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [4] ;  [9] ;  [10] ;  [10] ;  [1] ;  [1] ;  [11] ;  [12] ;  [13] more »;  [4] ;  [5] ;  [13] ;  [14] ;  [15] ;  [16] ;  [17] « less
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Univ. Paris Diderot-Paris, Paris (France)
  3. Univ. Pierre et Marie Curie Paris 6, Univ. Denis Diderot Paris 7, Paris Cedex (France)
  4. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  5. Aix-Marseille Univ., CNRS LAM (Lab. d'Astrophysique de Marseille), Marseille (France)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. College London, London (United Kingdom)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Ecole Polytechnique Federale de Lausanne, Lausanne (Switzlerland)
  9. Univ. of California, Irvine, CA (United States)
  10. Brookhaven National Lab. (BNL), Upton, NY (United States)
  11. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  12. Institucio Catalana de Recerca i Estudis Avancats, Barcelona (Spain); Univ. de Barcelona (UB-IEEC) (Catalonia)
  13. Univ. Paris 6 et CNRS, Paris (France)
  14. Univ. of Edinburgh, Edinburgh (United Kingdom)
  15. The Pennsylvania State Univ., University Park, PA (United States)
  16. The Ohio State Univ., Columbus, OH (United States)
  17. Univ. Paris-Saclay, Gif-sur-Yvette (France); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Report Number(s):
BNL-113763-2017-JA
Journal ID: ISSN 0004-6361
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 603; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmology; Lyα forest; large scale structure; dark energy
OSTI Identifier:
1351746